Add upload script and use bash

Dockerfile

@@ -2,7 +2,8 @@ FROM alpine
 
 RUN apk --no-cache add \
         libressl \
-        lftp
+        lftp \
+        bash
 
 ADD upload.sh /bin/
 RUN chmod +x /bin/upload.sh

upload.sh

@@ -1 +1,37 @@
 #!/bin/bash
+
+if [ -z "$PLUGIN_USERNAME" ]; then
+    echo "Need to set username"
+    exit 1
+fi
+
+if [ -z "$PLUGIN_HOSTNAME" ]; then
+    echo "Need to set hostname"
+    exit 1
+fi
+
+if [ -z "$PLUGIN_SECURE" ]; then
+    PLUGIN_SECURE="true"
+fi
+
+if [ -z "$PLUGIN_DEST_DIR" ]; then
+    PLUGIN_DEST_DIR="/"
+fi
+
+if [ -z "$PLUGIN_SRC_DIR" ]; then
+    PLUGIN_SRC_DIR="/"
+fi
+
+PLUGIN_EXCLUDE_STR=""
+PLUGIN_INCLUDE_STR=""
+
+IFS=',' read -ra in_arr <<< "$PLUGIN_EXCLUDE"
+for i in "${in_arr[@]}"; do
+    PLUGIN_EXCLUDE_STR="$PLUGIN_EXCLUDE_STR -x $i"
+done
+IFS=',' read -ra in_arr <<< "$PLUGIN_INCLUDE"
+for i in "${in_arr[@]}"; do
+    PLUGIN_INCLUDE_STR="$PLUGIN_INCLUDE_STR -x $i"
+done
+
+lftp -c "open -u $PLUGIN_USERNAME,$FTP_PASSWORD $PLUGIN_HOSTNAME; set ftp:ssl-force $PLUGIN_SECURE; set ftp:ssl-protect-data $PLUGIN_SECURE; mirror -R $PLUGIN_INCLUDE_STR $PLUGIN_EXCLUDE_STR $(pwd)$PLUGIN_SRC_DIR $PLUGIN_DEST_DIR"